ANODE ACTIVE MATERIAL FOR A RECHARGEABLE LITHIUM BATTERY

• Main Authors: MYUNG, SEUNG-TAEK, JO, JAE WON
• Format: Patent
• Language: English; French; German
• Published: 19.09.2012
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INORGANIC CHEMISTRY; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MANUFACTURE OR TREATMENT THEREOF; METALLURGY; NANOSTRUCTURES FORMED BY MANIPULATION OF INDIVIDUAL ATOMS,MOLECULES, OR LIMITED COLLECTIONS OF ATOMS OR MOLECULES ASDISCRETE UNITS; NANOTECHNOLOGY; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; VEHICLES IN GENERAL

The present invention relates to an anode active material for rechargeable lithium batteries and a method of manufacturing the same. The method includes preparing an anode active material for rechargeable lithium batteries includes heat treating a mixture of Li 2 CO 3 , MnO 2 , MgO, Al 2 O 3 and Co 3 O 4 at 900 to 1000°C in air or an oxygen atmosphere for 10 to 48 hours to generate a lithium-containing oxide; generating metal oxide nanoparticles MO (5 to 500 nm) (where M represents one of Mg, Co and Ni, and has a valence of 2); and dry or wet mixing 0.01 to 10 wt% of the pulverized metal oxide nanoparticles with the lithium-containing oxide to form an anode active material. According to the present invention, spinel type MgAl 2 O 4 is substituted into a basic spinel structure represented by Li 1.1 Mn 1.9 O 4 to provide structural stability and spinel type Co 3 O 4 is substituted into the basic spinel structure of Li 1.1 Mn 1.9 O 4 to improve electronic conductivity, thereby improving battery performance. Further, metal oxide nanoparticles MO (5 to 500 nm) (where M represents one of Mg, Co and Ni, and has a valence of 2) provided as an additive act as scavengers of HF generated by decomposition of the electrolyte, so that the spinel type anode active material may be used as an anode active material of spinel type LiMn 2 O 4 for rechargeable lithium ion batteries, thereby realizing low price, high output, long lifespan and high capacity of the rechargeable lithium batteries.